4.1.1 - The Variety Of Life Flashcards
What Is Biodiversity?
The variety of living organisms in an area.
What Does Biodiversity Include?
(2 Points)
~ Species diversity.
~ Genetic diversity.
What Does Biodiversity Look At?
The range and variety of genes, species and habitats within a particulate region.
What Is An Ecosystem?
All the living and non-living components of an area.
What Is Habitat Diversity?
Range of different ecosystems or habitats within a particular area or region.
What Is Meant By Niche?
Role of an organism in its environment.
What Is Meant By High Biodiversity & Give An Example?
(2 Points)
~ When there is a large number of different habitats within an area.
~ Coral reefs is an example.
What Is Meant By Low Biodiversity & Give An Example?
(2 Points)
~ When there is only one or two different habitats within an area.
~ Large sandy deserts.
What Is Species Richness?
Number of species within an area / community.
What Is Species Diversity?
The number of different species and the abundance of each species in an area.
What Factors Contribute To Greater Species Diversity In An Ecosystem?
(2 Points)
~ A greater number of species in the ecosystem.
~ A greater abundance of individuals from each species.
Why Are Ecosystems With High Species Diversity Usually More Stable Than Those With Lower Species Diversity?
They are more resilient to environmental changes, due to a greater variety of species fulfilling different ecological roles, which reduces the impact of the loss or decline of any single species.
What Is Genetic Diversity?
The different alleles that occur within the gene pool of a species or population.
Will Individuals Of The Same Species Have The Same Alleles For Each Gene?
No.
Why Might Genetic Diversity Arise Between Populations Of The Same Species?
(2 Points)
~ Populations occupying slightly different ranges in their habitat.
~ Exposure to different selection pressures, affecting allele frequencies.
